Added changelog entries for v0.4.5 release [skip ci]
Added changelog entries for v0.4.5 release [skip ci]

aleksandr-bakanov/astropy,mhvk/astropy,saimn/astropy,saimn/astropy,kelle/astropy,stargaser/astropy,MSeifert04/astropy,joergdietrich/astropy,dhomeier/astropy,aleksandr-bakanov/astropy,mhvk/astropy,DougBurke/astropy,astropy/astropy,bsipocz/astropy,joergdietrich/astropy,stargaser/astropy,AustereCuriosity/astropy,AustereCuriosity/astropy,AustereCuriosity/astropy,lpsinger/astropy,lpsinger/astropy,astropy/astropy,bsipocz/astropy,lpsinger/astropy,tbabej/astropy,StuartLittlefair/astropy,larrybradley/astropy,DougBurke/astropy,mhvk/astropy,funbaker/astropy,DougBurke/astropy,tbabej/astropy,joergdietrich/astropy,saimn/astropy,bsipocz/astropy,astropy/astropy,AustereCuriosity/astropy,larrybradley/astropy,pllim/astropy,aleksandr-bakanov/astropy,dhomeier/astropy,tbabej/astropy,pllim/astropy,funbaker/astropy,DougBurke/astropy,dhomeier/astropy,joergdietrich/astropy,mhvk/astropy,stargaser/astropy,dhomeier/astropy,bsipocz/astropy,astropy/astropy,pllim/astropy,StuartLittlefair/astropy,pllim/astropy,kelle/astropy,saimn/astropy,MSeifert04/astropy,MSeifert04/astropy,tbabej/astropy,AustereCuriosity/astropy,joergdietrich/astropy,astropy/astropy,funbaker/astropy,lpsinger/astropy,kelle/astropy,pllim/astropy,dhomeier/astropy,StuartLittlefair/astropy,funbaker/astropy,mhvk/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,larrybradley/astropy,stargaser/astropy,larrybradley/astropy,larrybradley/astropy,kelle/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,tbabej/astropy,kelle/astropy,lpsinger/astropy,saimn/astropy